The Red Triangle is the colloquial name of a roughly triangle-shaped region off the coast of northern California, extending from Bodega Bay, north of San Francisco, out slightly beyond the Farallon Islands, and down to the Big Sur region, south of Monterey. The area has a very large population of marine mammals, such as elephant seals, harbor seals, sea otters and sea lions, which are favored prey of great white sharks. [1] Around thirty-eight percent of recorded great white shark attacks on humans in the United States have occurred within the Red Triangle—eleven percent of the worldwide total. [2] The area encompasses the beaches of the heavily populated San Francisco Bay Area, and many people enjoy surfing, windsurfing, swimming and diving in these waters. [3]
The Red Triangle is defined by its vertices: the northern vertex is Bodega Bay (Bodega Head), the western vertex is the Farallones, and the southern vertex is Big Sur or Monterey Bay. [4] The movement of sharks and other large marine animals in this region were studied starting in 1999 under the Tagging of Pacific Predators (TOPP) program, an international collaboration. [5] TOPP found that white sharks in the Red Triangle are genetically distinct from others in the Pacific Ocean, such as those found off Australia. [5]
The population of northeastern Pacific white sharks tend to congregate along the north/central California coast each fall, then leave the area in December for the deep ocean approximately halfway between California and Hawaii. This region is referred to by TOPP as the White Shark Café. [5] Female whites tend to visit the Gulf of the Farallones every two years, which researchers believe to be based on the shark reproductive cycle. [4] Adult Great White Sharks are no longer present in the Red Triangle during the month of May, and start to return in August. [6]
The great white shark, also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans. It is the only known surviving species of its genus Carcharodon. The great white shark is notable for its size, with the largest preserved female specimen measuring 5.83 m (19.1 ft) in length and around 2,000 kg (4,410 lb) in weight at maturity. However, most are smaller; males measure 3.4 to 4.0 m, and females measure 4.6 to 4.9 m on average. According to a 2014 study, the lifespan of great white sharks is estimated to be as long as 70 years or more, well above previous estimates, making it one of the longest lived cartilaginous fishes currently known. According to the same study, male great white sharks take 26 years to reach sexual maturity, while the females take 33 years to be ready to produce offspring. Great white sharks can swim at speeds of 25 km/h (16 mph) for short bursts and to depths of 1,200 m (3,900 ft).
Monterey Bay Aquarium is a nonprofit public aquarium in Monterey, California. Known for its regional focus on the marine habitats of Monterey Bay, it was the first to exhibit a living kelp forest when it opened in October 1984. Its biologists have pioneered the animal husbandry of jellyfish and it was the first to successfully care for and display a great white shark. The organization's research and conservation efforts also focus on sea otters, various birds, and tunas. Seafood Watch, a sustainable seafood advisory list published by the aquarium beginning in 1999, has influenced the discussion surrounding sustainable seafood. The aquarium was home to Otter 841 prior to her release into the wild and Rosa, the oldest living sea otter at the time of her death.
Monterey Bay is a bay of the Pacific Ocean located on the coast of the U.S. state of California, south of the San Francisco Bay Area. San Francisco itself is further north along the coast, by about 75 miles, accessible via CA 1 and US 101.
Northern California is a geographic and cultural region that generally comprises the northern portion of the U.S. state of California, spanning the northernmost 48 of the state's 58 counties. Its main population centers include the San Francisco Bay Area, the Greater Sacramento area, the Redding, California, area south of the Cascade Range, and the Metropolitan Fresno area. Northern California also contains redwood forests, along with most of the Sierra Nevada, including Yosemite Valley and part of Lake Tahoe, Mount Shasta, and most of the Central Valley, one of the world's most productive agricultural regions. Northern California is also home to Silicon Valley, the global headquarters for some of the most powerful tech and Internet-related companies in the world, including Meta, Apple, Google, and Nvidia.
The Central Coast is an area of California, roughly spanning the coastal region between Point Mugu and Monterey Bay. It lies northwest of Los Angeles and south of the San Francisco Bay Area, and includes the rugged, rural, and sparsely populated stretch of coastline known as Big Sur.
Bodega Bay is a shallow, rocky inlet of the Pacific Ocean on the coast of northern California in the United States. It is approximately 5 mi (8 km) across and is located approximately 40 mi (60 km) northwest of San Francisco and 20 mi (32 km) west of Santa Rosa. The bay straddles the boundary between Sonoma County to the north and Marin County to the south. The bay is a marine habitat used for navigation, recreation, and commercial and sport fishing.
Bodega Head is a small promontory on the Pacific coast of northern California in the United States. It is located in Sonoma County at 38.311°N 123.066°W, approximately 40 mi (64 km) northwest of San Francisco and approximately 20 mi (32 km) west of Santa Rosa.
The Farallon Islands, or Farallones, are a group of islands and sea stacks in the Gulf of the Farallones, off the coast of San Francisco, California, United States. The islands are also sometimes referred to by mariners as the Devil's Teeth Islands, in reference to the many treacherous underwater shoals in their vicinity. The islands lie 30 miles (48 km) outside the Golden Gate and 20 miles (32 km) south of Point Reyes, and are visible from the mainland on clear days.The islands are part of the City and County of San Francisco. The only inhabited portion of the islands is on Southeast Farallon Island (SEFI), where researchers from Point Blue Conservation Science and the U.S. Fish and Wildlife Service stay. The islands are closed to the public.
The Greater Farallones National Marine Sanctuary protects the wildlife, habitats, and cultural resources of one of the most diverse and bountiful marine environments in the world, an area of 3,295 square miles off the northern and central California coast. The waters within Greater Farallones National Marine Sanctuary are part of a nationally significant marine ecosystem, and support an abundance of life, including many threatened or endangered species.
The Monterey Bay National Marine Sanctuary (MBNMS) is a federally protected marine area offshore of California's Big Sur and central coast in the United States. It is the largest US national marine sanctuary and has a shoreline length of 276 miles (444 km) stretching from just north of the Golden Gate Bridge at San Francisco to Cambria in San Luis Obispo County. Supporting one of the world's most diverse marine ecosystems, it is home to numerous mammals, seabirds, fishes, invertebrates and plants in a remarkably productive coastal environment. The MBNMS was established in 1992 for the purpose of resource protection, research, education, and public use.
The Golden Gate Biosphere Network is a voluntary coalition of federal, state and local government agencies, nonprofit organizations, universities, and private partners within the Golden Gate Biosphere region. The Network aims to protect the region's biodiversity and conserve its natural resources. The Network has been part of the UNESCO Man and Biosphere Programme since 1988 and is part of the US Biosphere Network as well as EuroMAB. It is recognized by UNESCO for its "significance for biological diversity conversation" and organizational efforts involving municipal authorities and private interests.
The leopard shark is a species of houndshark, in the family Triakidae. It is found along the Pacific coast of North America, from the U.S. state of Oregon to Mazatlán in Mexico. Typically measuring 1.2–1.5 m (3.9–4.9 ft) long, this slender-bodied shark is immediately identifiable by the striking pattern of black saddle-like markings and large spots over its back, from which it derives its common name. Large schools of leopard sharks are a common sight in bays and estuaries, swimming over sandy or muddy flats or rock-strewn areas near kelp beds and reefs. They are most common near the coast, in water less than 4 m (13 ft) deep.
During the Age of Discovery, the Spanish Empire undertook several expeditions to the Pacific Northwest of North America. Spanish claims to the region date to the papal bull of 1493, and the Treaty of Tordesillas signed in 1494. In 1513, this claim was reinforced by Spanish explorer Vasco Núñez de Balboa, the first European to sight the Pacific Ocean, when he claimed all lands adjoining this ocean for the Spanish Crown. Spain only started to colonize the claimed territory north of present-day Mexico in the 18th century, when it settled the northern coast of Las Californias.
Tagging of Pacific Predators (TOPP) began in 2000 as one of many projects formed by Census of Marine Life, an organization whose goal is to help understand and explain the diversity and abundances of the ocean in the past, present, and future. After they were formed, TOPP began by building a coalition of researchers from all over the world to find and study predators of the Pacific Ocean. Since then, they have satellite-tagged 22 different species and more than 2,000 animals. These animals include elephant seals, great white sharks, leatherback turtles, squid, albatrosses, and more.
Lovers Point State Marine Reserve (SMR) is one of four small marine protected areas located near the cities of Monterey and Pacific Grove, at the southern end of Monterey Bay on California’s central coast. The four MPAs together encompass 2.96 square miles (7.7 km2). The SMR protects all marine life within its boundaries. Fishing and take of all living marine resources is prohibited.
Before the 1849 California Gold Rush, American, English and Russian fur hunters were drawn to Spanish California in a California Fur Rush, to exploit its enormous fur resources. Before 1825, these Europeans were drawn to the northern and central California coast to harvest prodigious quantities of southern sea otter and fur seals, and then to the San Francisco Bay Area and Sacramento – San Joaquin River Delta to harvest beaver, river otter, marten, fisher, mink, gray fox, weasel, and harbor seal. It was California's early fur trade, more than any other single factor, that opened up the West, and the San Francisco Bay Area in particular, to world trade.
The fauna of the State of California may be the most diverse in the United States of America. Of the Lower 48 conterminous states, California has the greatest diversity in climate, terrain and geology in general. The state's six life zones are the lower Sonoran (desert); upper Sonoran ; transition ; and the Canadian, Hudsonian, and Arctic zones, comprising California's highest elevations. California’s diverse geography gives rise to dozens of different ecosystems, each of which has its own unique native plants and animals. California is a huge state, the 3rd largest in the U.S., and can range broadly in habitat type.